Modal CTools redirecting after modal is opened

Usual redirecting wont work if modal is opened. So to do that you need some custom code like this will work for redirecting after loging in.

function custom_user_login(&$edit, $account) {
        ctools_add_js('ajax-responder');
        $commands = array();
        $commands[] = ctools_ajax_command_redirect('first-time-login');
        print ajax_render($commands);
        exit;
 }

There is also a Rules redirect action if you install Modal Forms module, that has redirect modal aware, you can check the code there or just use it if you use rules.